Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4327ee9d91b9986…

MALICIOUS

PDF

67.4 KB Created: 2020-08-06 13:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9df77ce285b27bc191b19c636c88dd5 SHA-1: 5d4cfec159f822d2224bf1922aa53084a12f83cb SHA-256: b4327ee9d91b998672b0b5828cebaa91bedff11d6418bfe6f0c1b7683a1c7e42
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body also contains a call-to-action phrase, suggesting a lure to trick the user into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bruhn+errata+pdf In PDF document text
    • http://files.salighttravel.com/uploads/1/3/1/1/131164394/ac0dc4409.pdfIn PDF document text
    • http://files.microstatslab.ca/uploads/1/3/1/4/131437064/8436670.pdfIn PDF document text
    • http://files.parramattagaolghosttours.com.au/uploads/1/3/1/4/131453394/zanevapoxibaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0658/1147/files/65987408870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1662/6081/files/cds_1_2020_english_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/moselojufofipolagepeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/21078644297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6990/6854/files/bisek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/satemulufaroxomebasebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/1483532752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/wopiterapujitenurezaduze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5246/4293/files/21231686127.pdfIn PDF document text
    • https://www.linkedin.com/pulse/training-aircraftIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF3 4968 bytes
SHA-256: 433e4075bdb6f51e2fe63742f97a2f9a69e5281dabd5f1469e3c6ce1297c6d14
font_01_sfnt_off0000dbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD9 10852 bytes
SHA-256: 50b388507ddf47a297b04d7f2b17f3bb3f6e7a32234e7776062c210c743c0e87

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